title: The riddle of determining cardiac resynchronization therapy response a physiologic approach to dyssynchrony therapy.
authors.forename: Thomas H
authors.initials: TH
authors.lastname: Marwick
authors.forename: Randall C
authors.initials: RC
authors.lastname: Starling
mesh_terms: D002304:Cardiac Pacing, Artificial; D006333:Heart Failure / Q000503:physiopathology* / Q000628:therapy*; D006801:Humans; D014463:Ultrasonography; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging* / Q000503:physiopathology*